Ans 3 : Total number of monochlorination products = 3(without including stereochem) and 4 with stereochem
Ans 4 : B
Fe is in +1 oxidation state in this compound..and the configuration is 4s13d6..so the config will be 3d7 as one electron shifts from 4s to 3d wen the orbitals are hybridised..
3d7 so no chances of pairing..C ruled out..and it will have 3 unpaired electrons so D is also incorrect..
And EAN of this compound does not depend on the charge of NO...that's wat i think..btw NO donates three electrons in this case unlike all ligands that donate two electrons..